src/msw/textctrl.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/textctrl.cpp
   3 // Purpose:     wxTextCtrl
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 #ifdef __GNUG__
  17     #pragma implementation "textctrl.h"
  18 #endif
  19
  20 // ----------------------------------------------------------------------------
  21 // headers
  22 // ----------------------------------------------------------------------------
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #if wxUSE_TEXTCTRL
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/textctrl.h"
  35     #include "wx/settings.h"
  36     #include "wx/brush.h"
  37     #include "wx/utils.h"
  38     #include "wx/intl.h"
  39     #include "wx/log.h"
  40     #include "wx/app.h"
  41     #include "wx/menu.h"
  42 #endif
  43
  44 #include "wx/module.h"
  45
  46 #if wxUSE_CLIPBOARD
  47     #include "wx/clipbrd.h"
  48 #endif
  49
  50 #include "wx/textfile.h"
  51
  52 #include <windowsx.h>
  53
  54 #include "wx/msw/private.h"
  55
  56 #include <string.h>
  57 #include <stdlib.h>
  58 #include <sys/types.h>
  59
  60 #if wxUSE_RICHEDIT
  61
  62 // old mingw32 has richedit stuff directly in windows.h and doesn't have
  63 // richedit.h at all
  64 #if !defined(__GNUWIN32_OLD__) || defined(__CYGWIN10__)
  65     #include <richedit.h>
  66 #endif
  67
  68 #include "wx/msw/missing.h"
  69
  70 #endif // wxUSE_RICHEDIT
  71
  72 // ----------------------------------------------------------------------------
  73 // private functions
  74 // ----------------------------------------------------------------------------
  75
  76 #if wxUSE_RICHEDIT
  77
  78 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb);
  79
  80 #endif // wxUSE_RICHEDIT
  81
  82 // ----------------------------------------------------------------------------
  83 // private classes
  84 // ----------------------------------------------------------------------------
  85
  86 #if wxUSE_RICHEDIT
  87
  88 // this module initializes RichEdit DLL(s) if needed
  89 class wxRichEditModule : public wxModule
  90 {
  91 public:
  92     virtual bool OnInit();
  93     virtual void OnExit();
  94
  95     // load the richedit DLL of at least of required version
  96     static bool Load(int version = 1);
  97
  98 private:
  99     // the handles to richedit 1.0 and 2.0 (or 3.0) DLLs
 100     static HINSTANCE ms_hRichEdit[2];
 101
 102     DECLARE_DYNAMIC_CLASS(wxRichEditModule)
 103 };
 104
 105 HINSTANCE wxRichEditModule::ms_hRichEdit[2] = { NULL, NULL };
 106
 107 IMPLEMENT_DYNAMIC_CLASS(wxRichEditModule, wxModule)
 108
 109 #endif // wxUSE_RICHEDIT
 110
 111 // ----------------------------------------------------------------------------
 112 // event tables and other macros
 113 // ----------------------------------------------------------------------------
 114
 115 IMPLEMENT_DYNAMIC_CLASS(wxTextCtrl, wxControl)
 116
 117 BEGIN_EVENT_TABLE(wxTextCtrl, wxControl)
 118     EVT_CHAR(wxTextCtrl::OnChar)
 119     EVT_DROP_FILES(wxTextCtrl::OnDropFiles)
 120
 121 #if wxUSE_RICHEDIT
 122     EVT_RIGHT_UP(wxTextCtrl::OnRightClick)
 123 #endif
 124
 125     EVT_MENU(wxID_CUT, wxTextCtrl::OnCut)
 126     EVT_MENU(wxID_COPY, wxTextCtrl::OnCopy)
 127     EVT_MENU(wxID_PASTE, wxTextCtrl::OnPaste)
 128     EVT_MENU(wxID_UNDO, wxTextCtrl::OnUndo)
 129     EVT_MENU(wxID_REDO, wxTextCtrl::OnRedo)
 130     EVT_MENU(wxID_CLEAR, wxTextCtrl::OnDelete)
 131     EVT_MENU(wxID_SELECTALL, wxTextCtrl::OnSelectAll)
 132
 133     EVT_UPDATE_UI(wxID_CUT, wxTextCtrl::OnUpdateCut)
 134     EVT_UPDATE_UI(wxID_COPY, wxTextCtrl::OnUpdateCopy)
 135     EVT_UPDATE_UI(wxID_PASTE, wxTextCtrl::OnUpdatePaste)
 136     EVT_UPDATE_UI(wxID_UNDO, wxTextCtrl::OnUpdateUndo)
 137     EVT_UPDATE_UI(wxID_REDO, wxTextCtrl::OnUpdateRedo)
 138     EVT_UPDATE_UI(wxID_CLEAR, wxTextCtrl::OnUpdateDelete)
 139     EVT_UPDATE_UI(wxID_SELECTALL, wxTextCtrl::OnUpdateSelectAll)
 140 #ifdef __WIN16__
 141     EVT_ERASE_BACKGROUND(wxTextCtrl::OnEraseBackground)
 142 #endif
 143 END_EVENT_TABLE()
 144
 145 // ============================================================================
 146 // implementation
 147 // ============================================================================
 148
 149 // ----------------------------------------------------------------------------
 150 // creation
 151 // ----------------------------------------------------------------------------
 152
 153 void wxTextCtrl::Init()
 154 {
 155 #if wxUSE_RICHEDIT
 156     m_verRichEdit = 0;
 157 #endif // wxUSE_RICHEDIT
 158
 159     m_privateContextMenu = NULL;
 160     m_suppressNextUpdate = FALSE;
 161 }
 162
 163 wxTextCtrl::~wxTextCtrl()
 164 {
 165     if (m_privateContextMenu)
 166     {
 167         delete m_privateContextMenu;
 168         m_privateContextMenu = NULL;
 169     }
 170 }
 171
 172 bool wxTextCtrl::Create(wxWindow *parent, wxWindowID id,
 173                         const wxString& value,
 174                         const wxPoint& pos,
 175                         const wxSize& size,
 176                         long style,
 177                         const wxValidator& validator,
 178                         const wxString& name)
 179 {
 180     // base initialization
 181     if ( !CreateBase(parent, id, pos, size, style, validator, name) )
 182         return FALSE;
 183
 184     if ( parent )
 185         parent->AddChild(this);
 186
 187     // translate wxWin style flags to MSW ones
 188     WXDWORD msStyle = MSWGetCreateWindowFlags();
 189
 190     // do create the control - either an EDIT or RICHEDIT
 191     wxString windowClass = wxT("EDIT");
 192
 193 #if wxUSE_RICHEDIT
 194     if ( m_windowStyle & wxTE_AUTO_URL )
 195     {
 196         // automatic URL detection only works in RichEdit 2.0+
 197         m_windowStyle |= wxTE_RICH2;
 198     }
 199
 200     if ( m_windowStyle & wxTE_RICH2 )
 201     {
 202         // using richedit 2.0 implies using wxTE_RICH
 203         m_windowStyle |= wxTE_RICH;
 204     }
 205
 206     // we need to load the richedit DLL before creating the rich edit control
 207     if ( m_windowStyle & wxTE_RICH )
 208     {
 209         static bool s_errorGiven = FALSE;// MT-FIXME
 210
 211         // Which version do we need? Use 1.0 by default because it is much more
 212         // like the the standard EDIT or 2.0 if explicitly requested, but use
 213         // only 2.0 in Unicode mode as 1.0 doesn't support Unicode at all
 214         //
 215         // TODO: RichEdit 3.0 is apparently capable of emulating RichEdit 1.0
 216         //       (and thus EDIT) much better than RichEdit 2.0 so we probably
 217         //       should use 3.0 if available as it is the best of both worlds -
 218         //       but as I can't test it right now I don't do it (VZ)
 219 #if wxUSE_UNICODE
 220         const int verRichEdit = 2;
 221 #else // !wxUSE_UNICODE
 222         int verRichEdit = m_windowStyle & wxTE_RICH2 ? 2 : 1;
 223 #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 224
 225         // only give the error msg once if the DLL can't be loaded
 226         if ( !s_errorGiven )
 227         {
 228             // try to load the RichEdit DLL (will do nothing if already done)
 229             if ( !wxRichEditModule::Load(verRichEdit) )
 230             {
 231 #if !wxUSE_UNICODE
 232                 // try another version?
 233                 verRichEdit = 3 - verRichEdit; // 1 <-> 2
 234
 235                 if ( !wxRichEditModule::Load(verRichEdit) )
 236 #endif // wxUSE_UNICODE
 237                 {
 238                     wxLogError(_("Impossible to create a rich edit control, using simple text control instead. Please reinstall riched32.dll"));
 239
 240                     s_errorGiven = TRUE;
 241                 }
 242             }
 243         }
 244
 245         // have we managed to load any richedit version?
 246         if ( !s_errorGiven )
 247         {
 248             m_verRichEdit = verRichEdit;
 249             if ( m_verRichEdit == 1 )
 250             {
 251                 windowClass = wxT("RICHEDIT");
 252             }
 253             else
 254             {
 255 #ifndef RICHEDIT_CLASS
 256                 wxString RICHEDIT_CLASS;
 257                 RICHEDIT_CLASS.Printf(_T("RichEdit%d0"), m_verRichEdit);
 258 #if wxUSE_UNICODE
 259                 RICHEDIT_CLASS += _T('W');
 260 #else // ANSI
 261                 RICHEDIT_CLASS += _T('A');
 262 #endif // Unicode/ANSI
 263 #endif // !RICHEDIT_CLASS
 264
 265                 windowClass = RICHEDIT_CLASS;
 266             }
 267         }
 268     }
 269 #endif // wxUSE_RICHEDIT
 270
 271     // we need to turn '\n's into "\r\n"s for the multiline controls
 272     wxString valueWin;
 273     if ( m_windowStyle & wxTE_MULTILINE )
 274     {
 275         valueWin = wxTextFile::Translate(value, wxTextFileType_Dos);
 276     }
 277     else // single line
 278     {
 279         valueWin = value;
 280     }
 281
 282     if ( !MSWCreateControl(windowClass, msStyle, pos, size, valueWin) )
 283         return FALSE;
 284
 285     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 286
 287 #if wxUSE_RICHEDIT
 288     if ( IsRich() )
 289     {
 290         // enable the events we're interested in: we want to get EN_CHANGE as
 291         // for the normal controls
 292         LPARAM mask = ENM_CHANGE;
 293
 294         if ( GetRichVersion() == 1 )
 295         {
 296             // we also need EN_MSGFILTER for richedit 1.0 for the reasons
 297             // explained in its handler
 298            mask |= ENM_MOUSEEVENTS;
 299         }
 300         else if ( m_windowStyle & wxTE_AUTO_URL )
 301         {
 302             mask |= ENM_LINK;
 303
 304             ::SendMessage(GetHwnd(), EM_AUTOURLDETECT, TRUE, 0);
 305         }
 306
 307         ::SendMessage(GetHwnd(), EM_SETEVENTMASK, 0, mask);
 308     }
 309 #endif // wxUSE_RICHEDIT
 310
 311     return TRUE;
 312 }
 313
 314 // Make sure the window style (etc.) reflects the HWND style (roughly)
 315 void wxTextCtrl::AdoptAttributesFromHWND()
 316 {
 317     wxWindow::AdoptAttributesFromHWND();
 318
 319     HWND hWnd = GetHwnd();
 320     long style = ::GetWindowLong(hWnd, GWL_STYLE);
 321
 322     // retrieve the style to see whether this is an edit or richedit ctrl
 323 #if wxUSE_RICHEDIT
 324     wxString classname = wxGetWindowClass(GetHWND());
 325
 326     if ( classname.IsSameAs(_T("EDIT"), FALSE /* no case */) )
 327     {
 328         m_verRichEdit = 0;
 329     }
 330     else // rich edit?
 331     {
 332         wxChar c;
 333         if ( wxSscanf(classname, _T("RichEdit%d0%c"), &m_verRichEdit, &c) != 2 )
 334         {
 335             wxLogDebug(_T("Unknown edit control '%s'."), classname.c_str());
 336
 337             m_verRichEdit = 0;
 338         }
 339     }
 340 #endif // wxUSE_RICHEDIT
 341
 342     if (style & ES_MULTILINE)
 343         m_windowStyle |= wxTE_MULTILINE;
 344     if (style & ES_PASSWORD)
 345         m_windowStyle |= wxTE_PASSWORD;
 346     if (style & ES_READONLY)
 347         m_windowStyle |= wxTE_READONLY;
 348     if (style & ES_WANTRETURN)
 349         m_windowStyle |= wxTE_PROCESS_ENTER;
 350     if (style & ES_CENTER)
 351         m_windowStyle |= wxTE_CENTRE;
 352     if (style & ES_RIGHT)
 353         m_windowStyle |= wxTE_RIGHT;
 354 }
 355
 356 WXDWORD wxTextCtrl::MSWGetStyle(long style, WXDWORD *exstyle) const
 357 {
 358     // default border for the text controls is the sunken one
 359     if ( (style & wxBORDER_MASK) == wxBORDER_DEFAULT )
 360     {
 361         style |= wxBORDER_SUNKEN;
 362     }
 363
 364     long msStyle = wxControl::MSWGetStyle(style, exstyle);
 365
 366     // styles which we alaways add by default
 367     if ( style & wxTE_MULTILINE )
 368     {
 369         wxASSERT_MSG( !(style & wxTE_PROCESS_ENTER),
 370                       wxT("wxTE_PROCESS_ENTER style is ignored for multiline text controls (they always process it)") );
 371
 372         msStyle |= ES_MULTILINE | ES_WANTRETURN;
 373         if ( !(style & wxTE_NO_VSCROLL) )
 374         {
 375             // always adjust the vertical scrollbar automatically if we have it
 376             msStyle |= WS_VSCROLL | ES_AUTOVSCROLL;
 377
 378 #if wxUSE_RICHEDIT
 379             // we have to use this style for the rich edit controls because
 380             // without it the vertical scrollbar never appears at all in
 381             // richedit 3.0 because of our ECO_NOHIDESEL hack (search for it)
 382             if ( style & wxTE_RICH2 )
 383             {
 384                 msStyle |= ES_DISABLENOSCROLL;
 385             }
 386 #endif // wxUSE_RICHEDIT
 387         }
 388
 389         style |= wxTE_PROCESS_ENTER;
 390     }
 391     else // !multiline
 392     {
 393         // there is really no reason to not have this style for single line
 394         // text controls
 395         msStyle |= ES_AUTOHSCROLL;
 396     }
 397
 398     // styles which we add depending on the specified wxWindows styles
 399     if ( style & wxHSCROLL )
 400     {
 401         // automatically scroll the control horizontally as necessary
 402         msStyle |= WS_HSCROLL;// | ES_AUTOHSCROLL;
 403     }
 404
 405     if ( style & wxTE_READONLY )
 406         msStyle |= ES_READONLY;
 407
 408     if ( style & wxTE_PASSWORD )
 409         msStyle |= ES_PASSWORD;
 410
 411     if ( style & wxTE_NOHIDESEL )
 412         msStyle |= ES_NOHIDESEL;
 413
 414     // note that we can't do do "& wxTE_LEFT" as wxTE_LEFT == 0
 415     if ( style & wxTE_CENTRE )
 416         msStyle |= ES_CENTER;
 417     else if ( style & wxTE_RIGHT )
 418         msStyle |= ES_RIGHT;
 419     else
 420         msStyle |= ES_LEFT; // ES_LEFT if 0 as well but for consistency...
 421
 422     return msStyle;
 423 }
 424
 425 void wxTextCtrl::SetWindowStyleFlag(long style)
 426 {
 427     if ( (style & wxBORDER_MASK) == wxBORDER_DEFAULT )
 428         style |= wxBORDER_SUNKEN;
 429
 430 #if wxUSE_RICHEDIT
 431     // we have to deal with some styles separately because they can't be
 432     // changed by simply calling SetWindowLong(GWL_STYLE) but can be changed
 433     // using richedit-specific EM_SETOPTIONS
 434     if ( IsRich() &&
 435             ((style & wxTE_NOHIDESEL) != (GetWindowStyle() & wxTE_NOHIDESEL)) )
 436     {
 437         bool set = (style & wxTE_NOHIDESEL) != 0;
 438
 439         ::SendMessage(GetHwnd(), EM_SETOPTIONS, set ? ECOOP_OR : ECOOP_AND,
 440                       set ? ECO_NOHIDESEL : ~ECO_NOHIDESEL);
 441     }
 442 #endif // wxUSE_RICHEDIT
 443
 444     wxControl::SetWindowStyleFlag(style);
 445 }
 446
 447 // ----------------------------------------------------------------------------
 448 // set/get the controls text
 449 // ----------------------------------------------------------------------------
 450
 451 wxString wxTextCtrl::GetValue() const
 452 {
 453     // range 0..-1 is special for GetRange() and means to retrieve all text
 454     return GetRange(0, -1);
 455 }
 456
 457 wxString wxTextCtrl::GetRange(long from, long to) const
 458 {
 459     wxString str;
 460
 461     if ( from >= to && to != -1 )
 462     {
 463         // nothing to retrieve
 464         return str;
 465     }
 466
 467 #if wxUSE_RICHEDIT
 468     if ( IsRich() )
 469     {
 470         int len = GetWindowTextLength(GetHwnd());
 471         if ( len > from )
 472         {
 473             // alloc one extra WORD as needed by the control
 474             wxChar *p = str.GetWriteBuf(++len);
 475
 476             TEXTRANGE textRange;
 477             textRange.chrg.cpMin = from;
 478             textRange.chrg.cpMax = to == -1 ? len : to;
 479             textRange.lpstrText = p;
 480
 481             (void)SendMessage(GetHwnd(), EM_GETTEXTRANGE, 0, (LPARAM)&textRange);
 482
 483             if ( m_verRichEdit > 1 )
 484             {
 485                 // RichEdit 2.0 uses just CR ('\r') for the newlines which is
 486                 // neither Unix nor Windows style - convert it to something
 487                 // reasonable
 488                 for ( ; *p; p++ )
 489                 {
 490                     if ( *p == _T('\r') )
 491                         *p = _T('\n');
 492                 }
 493             }
 494
 495             str.UngetWriteBuf();
 496
 497             if ( m_verRichEdit == 1 )
 498             {
 499                 // convert to the canonical form - see comment below
 500                 str = wxTextFile::Translate(str, wxTextFileType_Unix);
 501             }
 502         }
 503         //else: no text at all, leave the string empty
 504     }
 505     else
 506 #endif // wxUSE_RICHEDIT
 507     {
 508         // retrieve all text
 509         str = wxGetWindowText(GetHWND());
 510
 511         // need only a range?
 512         if ( from < to )
 513         {
 514             str = str.Mid(from, to - from);
 515         }
 516
 517         // WM_GETTEXT uses standard DOS CR+LF (\r\n) convention - convert to the
 518         // canonical one (same one as above) for consistency with the other kinds
 519         // of controls and, more importantly, with the other ports
 520         str = wxTextFile::Translate(str, wxTextFileType_Unix);
 521     }
 522
 523     return str;
 524 }
 525
 526 void wxTextCtrl::SetValue(const wxString& value)
 527 {
 528     // if the text is long enough, it's faster to just set it instead of first
 529     // comparing it with the old one (chances are that it will be different
 530     // anyhow, this comparison is there to avoid flicker for small single-line
 531     // edit controls mostly)
 532     if ( (value.length() > 0x400) || (value != GetValue()) )
 533     {
 534         DoWriteText(value, FALSE /* not selection only */);
 535     }
 536
 537     // we should reset the modified flag even if the value didn't really change
 538
 539     // mark the control as being not dirty - we changed its text, not the
 540     // user
 541     DiscardEdits();
 542
 543     // for compatibility, don't move the cursor when doing SetValue()
 544     SetInsertionPoint(0);
 545 }
 546
 547 #if wxUSE_RICHEDIT && (!wxUSE_UNICODE || wxUSE_UNICODE_MSLU)
 548
 549 DWORD CALLBACK wxRichEditStreamIn(DWORD dwCookie, BYTE *buf, LONG cb, LONG *pcb)
 550 {
 551     *pcb = 0;
 552
 553     wchar_t *wbuf = (wchar_t *)buf;
 554     const wchar_t *wpc = *(const wchar_t **)dwCookie;
 555     while ( cb && *wpc )
 556     {
 557         *wbuf++ = *wpc++;
 558
 559         cb -= sizeof(wchar_t);
 560         (*pcb) += sizeof(wchar_t);
 561     }
 562
 563     *(const wchar_t **)dwCookie = wpc;
 564
 565     return 0;
 566 }
 567
 568 // from utils.cpp
 569 extern WXDLLIMPEXP_BASE long wxEncodingToCodepage(wxFontEncoding encoding);
 570
 571 #if wxUSE_UNICODE_MSLU
 572 bool wxTextCtrl::StreamIn(const wxString& value,
 573                           wxFontEncoding WXUNUSED(encoding),
 574                           bool selectionOnly)
 575 {
 576     const wchar_t *wpc = value.c_str();
 577 #else // !wxUSE_UNICODE_MSLU
 578 bool wxTextCtrl::StreamIn(const wxString& value,
 579                           wxFontEncoding encoding,
 580                           bool selectionOnly)
 581 {
 582     // we have to use EM_STREAMIN to force richedit control 2.0+ to show any
 583     // text in the non default charset -- otherwise it thinks it knows better
 584     // than we do and always shows it in the default one
 585
 586     // first get the Windows code page for this encoding
 587     long codepage = wxEncodingToCodepage(encoding);
 588     if ( codepage == -1 )
 589     {
 590         // unknown encoding
 591         return FALSE;
 592     }
 593
 594     // next translate to Unicode using this code page
 595     int len = ::MultiByteToWideChar(codepage, 0, value, -1, NULL, 0);
 596
 597 #if wxUSE_WCHAR_T
 598     wxWCharBuffer wchBuf(len);
 599 #else
 600     wchar_t *wchBuf = (wchar_t *)malloc((len + 1)*sizeof(wchar_t));
 601 #endif
 602
 603     if ( !::MultiByteToWideChar(codepage, 0, value, -1,
 604                                 (wchar_t *)(const wchar_t *)wchBuf, len) )
 605     {
 606         wxLogLastError(_T("MultiByteToWideChar"));
 607     }
 608
 609     // finally, stream it in the control
 610     const wchar_t *wpc = wchBuf;
 611 #endif // wxUSE_UNICODE_MSLU
 612
 613     EDITSTREAM eds;
 614     wxZeroMemory(eds);
 615     eds.dwCookie = (DWORD)&wpc;
 616     // the cast below is needed for broken (very) old mingw32 headers
 617     eds.pfnCallback = (EDITSTREAMCALLBACK)wxRichEditStreamIn;
 618
 619     // we're going to receive 2 EN_CHANGE notifications if we got any selection
 620     // (same problem as in DoWriteText())
 621     if ( selectionOnly && HasSelection() )
 622     {
 623         // so suppress one of them
 624         m_suppressNextUpdate = TRUE;
 625     }
 626
 627     ::SendMessage(GetHwnd(), EM_STREAMIN,
 628                   SF_TEXT |
 629                   SF_UNICODE |
 630                   (selectionOnly ? SFF_SELECTION : 0),
 631                   (LPARAM)&eds);
 632
 633     if ( eds.dwError )
 634     {
 635         wxLogLastError(_T("EM_STREAMIN"));
 636     }
 637
 638 #if !wxUSE_WCHAR_T
 639     free(wchBuf);
 640 #endif // !wxUSE_WCHAR_T
 641
 642     return TRUE;
 643 }
 644
 645 #endif // wxUSE_RICHEDIT
 646
 647 void wxTextCtrl::WriteText(const wxString& value)
 648 {
 649     DoWriteText(value);
 650 }
 651
 652 void wxTextCtrl::DoWriteText(const wxString& value, bool selectionOnly)
 653 {
 654     wxString valueDos;
 655     if ( m_windowStyle & wxTE_MULTILINE )
 656         valueDos = wxTextFile::Translate(value, wxTextFileType_Dos);
 657     else
 658         valueDos = value;
 659
 660 #if wxUSE_RICHEDIT
 661     // there are several complications with the rich edit controls here
 662     bool done = FALSE;
 663     if ( IsRich() )
 664     {
 665         // first, ensure that the new text will be in the default style
 666         if ( !m_defaultStyle.IsDefault() )
 667         {
 668             long start, end;
 669             GetSelection(&start, &end);
 670             SetStyle(start, end, m_defaultStyle);
 671         }
 672
 673 #if wxUSE_UNICODE_MSLU
 674         // RichEdit doesn't have Unicode version of EM_REPLACESEL on Win9x,
 675         // but EM_STREAMIN works
 676         if ( wxUsingUnicowsDll() && GetRichVersion() > 1 )
 677         {
 678            done = StreamIn(valueDos, wxFONTENCODING_SYSTEM, selectionOnly);
 679         }
 680 #endif // wxUSE_UNICODE_MSLU
 681
 682 #if !wxUSE_UNICODE
 683         // next check if the text we're inserting must be shown in a non
 684         // default charset -- this only works for RichEdit > 1.0
 685         if ( GetRichVersion() > 1 )
 686         {
 687             wxFont font = m_defaultStyle.GetFont();
 688             if ( !font.Ok() )
 689                 font = GetFont();
 690
 691             if ( font.Ok() )
 692             {
 693                wxFontEncoding encoding = font.GetEncoding();
 694                if ( encoding != wxFONTENCODING_SYSTEM )
 695                {
 696                    done = StreamIn(valueDos, encoding, selectionOnly);
 697                }
 698             }
 699         }
 700 #endif // !wxUSE_UNICODE
 701     }
 702
 703     if ( !done )
 704 #endif // wxUSE_RICHEDIT
 705     {
 706         // in some cases we get 2 EN_CHANGE notifications after the SendMessage
 707         // call below which is confusing for the client code and so should be
 708         // avoided
 709         //
 710         // these cases are: (a) plain EDIT controls if EM_REPLACESEL is used
 711         // and there is a non empty selection currently and (b) rich text
 712         // controls in any case
 713         if (
 714 #if wxUSE_RICHEDIT
 715             IsRich() ||
 716 #endif // wxUSE_RICHEDIT
 717             (selectionOnly && HasSelection()) )
 718         {
 719             m_suppressNextUpdate = TRUE;
 720         }
 721
 722         ::SendMessage(GetHwnd(), selectionOnly ? EM_REPLACESEL : WM_SETTEXT,
 723                       0, (LPARAM)valueDos.c_str());
 724
 725         // OTOH, non rich text controls don't generate any events at all when
 726         // we use WM_SETTEXT -- have to emulate them here
 727         if ( !selectionOnly
 728 #if wxUSE_RICHEDIT
 729                 && !IsRich()
 730 #endif // wxUSE_RICHEDIT
 731            )
 732         {
 733             // Windows already sends an update event for single-line
 734             // controls.
 735             if ( m_windowStyle & wxTE_MULTILINE )
 736                 SendUpdateEvent();
 737         }
 738     }
 739
 740     AdjustSpaceLimit();
 741 }
 742
 743 void wxTextCtrl::AppendText(const wxString& text)
 744 {
 745     SetInsertionPointEnd();
 746
 747     WriteText(text);
 748
 749 #if wxUSE_RICHEDIT
 750     if ( IsMultiLine() && GetRichVersion() > 1 )
 751     {
 752         // setting the caret to the end and showing it simply doesn't work for
 753         // RichEdit 2.0 -- force it to still do what we want
 754         ::SendMessage(GetHwnd(), EM_LINESCROLL, 0, GetNumberOfLines());
 755     }
 756 #endif // wxUSE_RICHEDIT
 757 }
 758
 759 void wxTextCtrl::Clear()
 760 {
 761     ::SetWindowText(GetHwnd(), wxT(""));
 762
 763 #if wxUSE_RICHEDIT
 764     if ( !IsRich() )
 765 #endif // wxUSE_RICHEDIT
 766     {
 767         // rich edit controls send EN_UPDATE from WM_SETTEXT handler themselves
 768         // but the normal ones don't -- make Clear() behaviour consistent by
 769         // always sending this event
 770
 771         // Windows already sends an update event for single-line
 772         // controls.
 773         if ( m_windowStyle & wxTE_MULTILINE )
 774             SendUpdateEvent();
 775     }
 776 }
 777
 778 #ifdef __WIN32__
 779
 780 bool wxTextCtrl::EmulateKeyPress(const wxKeyEvent& event)
 781 {
 782     SetFocus();
 783
 784     size_t lenOld = GetValue().length();
 785
 786     wxUint32 code = event.GetRawKeyCode();
 787     ::keybd_event(code, 0, 0 /* key press */, 0);
 788     ::keybd_event(code, 0, KEYEVENTF_KEYUP, 0);
 789
 790     // assume that any alphanumeric key changes the total number of characters
 791     // in the control - this should work in 99% of cases
 792     return GetValue().length() != lenOld;
 793 }
 794
 795 #endif // __WIN32__
 796
 797 // ----------------------------------------------------------------------------
 798 // Clipboard operations
 799 // ----------------------------------------------------------------------------
 800
 801 void wxTextCtrl::Copy()
 802 {
 803     if (CanCopy())
 804     {
 805         ::SendMessage(GetHwnd(), WM_COPY, 0, 0L);
 806     }
 807 }
 808
 809 void wxTextCtrl::Cut()
 810 {
 811     if (CanCut())
 812     {
 813         ::SendMessage(GetHwnd(), WM_CUT, 0, 0L);
 814     }
 815 }
 816
 817 void wxTextCtrl::Paste()
 818 {
 819     if (CanPaste())
 820     {
 821         ::SendMessage(GetHwnd(), WM_PASTE, 0, 0L);
 822     }
 823 }
 824
 825 bool wxTextCtrl::HasSelection() const
 826 {
 827     long from, to;
 828     GetSelection(&from, &to);
 829     return from != to;
 830 }
 831
 832 bool wxTextCtrl::CanCopy() const
 833 {
 834     // Can copy if there's a selection
 835     return HasSelection();
 836 }
 837
 838 bool wxTextCtrl::CanCut() const
 839 {
 840     return CanCopy() && IsEditable();
 841 }
 842
 843 bool wxTextCtrl::CanPaste() const
 844 {
 845     if ( !IsEditable() )
 846         return FALSE;
 847
 848 #if wxUSE_RICHEDIT
 849     if ( IsRich() )
 850     {
 851         UINT cf = 0; // 0 == any format
 852
 853         return ::SendMessage(GetHwnd(), EM_CANPASTE, cf, 0) != 0;
 854     }
 855 #endif // wxUSE_RICHEDIT
 856
 857     // Standard edit control: check for straight text on clipboard
 858     if ( !::OpenClipboard(GetHwndOf(wxTheApp->GetTopWindow())) )
 859         return FALSE;
 860
 861     bool isTextAvailable = ::IsClipboardFormatAvailable(CF_TEXT) != 0;
 862     ::CloseClipboard();
 863
 864     return isTextAvailable;
 865 }
 866
 867 // ----------------------------------------------------------------------------
 868 // Accessors
 869 // ----------------------------------------------------------------------------
 870
 871 void wxTextCtrl::SetEditable(bool editable)
 872 {
 873     HWND hWnd = GetHwnd();
 874     SendMessage(hWnd, EM_SETREADONLY, (WPARAM)!editable, (LPARAM)0L);
 875 }
 876
 877 void wxTextCtrl::SetInsertionPoint(long pos)
 878 {
 879     DoSetSelection(pos, pos);
 880 }
 881
 882 void wxTextCtrl::SetInsertionPointEnd()
 883 {
 884     // we must not do anything if the caret is already there because calling
 885     // SetInsertionPoint() thaws the controls if Freeze() had been called even
 886     // if it doesn't actually move the caret anywhere and so the simple fact of
 887     // doing it results in horrible flicker when appending big amounts of text
 888     // to the control in a few chunks (see DoAddText() test in the text sample)
 889     if ( GetInsertionPoint() == GetLastPosition() )
 890         return;
 891
 892     long pos;
 893
 894 #if wxUSE_RICHEDIT
 895     if ( m_verRichEdit == 1 )
 896     {
 897         // we don't have to waste time calling GetLastPosition() in this case
 898         pos = -1;
 899     }
 900     else // !RichEdit 1.0
 901 #endif // wxUSE_RICHEDIT
 902     {
 903         pos = GetLastPosition();
 904     }
 905
 906     SetInsertionPoint(pos);
 907 }
 908
 909 long wxTextCtrl::GetInsertionPoint() const
 910 {
 911 #if wxUSE_RICHEDIT
 912     if ( IsRich() )
 913     {
 914         CHARRANGE range;
 915         range.cpMin = 0;
 916         range.cpMax = 0;
 917         SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &range);
 918         return range.cpMin;
 919     }
 920 #endif // wxUSE_RICHEDIT
 921
 922     DWORD Pos = (DWORD)SendMessage(GetHwnd(), EM_GETSEL, 0, 0L);
 923     return Pos & 0xFFFF;
 924 }
 925
 926 long wxTextCtrl::GetLastPosition() const
 927 {
 928     int numLines = GetNumberOfLines();
 929     long posStartLastLine = XYToPosition(0, numLines - 1);
 930
 931     long lenLastLine = GetLengthOfLineContainingPos(posStartLastLine);
 932
 933     return posStartLastLine + lenLastLine;
 934 }
 935
 936 // If the return values from and to are the same, there is no
 937 // selection.
 938 void wxTextCtrl::GetSelection(long* from, long* to) const
 939 {
 940 #if wxUSE_RICHEDIT
 941     if ( IsRich() )
 942     {
 943         CHARRANGE charRange;
 944         ::SendMessage(GetHwnd(), EM_EXGETSEL, 0, (LPARAM) &charRange);
 945
 946         *from = charRange.cpMin;
 947         *to = charRange.cpMax;
 948     }
 949     else
 950 #endif // !wxUSE_RICHEDIT
 951     {
 952         DWORD dwStart, dwEnd;
 953         ::SendMessage(GetHwnd(), EM_GETSEL, (WPARAM)&dwStart, (LPARAM)&dwEnd);
 954
 955         *from = dwStart;
 956         *to = dwEnd;
 957     }
 958 }
 959
 960 bool wxTextCtrl::IsEditable() const
 961 {
 962     // strangely enough, we may be called before the control is created: our
 963     // own Create() calls MSWGetStyle() which calls AcceptsFocus() which calls
 964     // us
 965     if ( !m_hWnd )
 966         return TRUE;
 967
 968     long style = ::GetWindowLong(GetHwnd(), GWL_STYLE);
 969
 970     return (style & ES_READONLY) == 0;
 971 }
 972
 973 // ----------------------------------------------------------------------------
 974 // selection
 975 // ----------------------------------------------------------------------------
 976
 977 void wxTextCtrl::SetSelection(long from, long to)
 978 {
 979     // if from and to are both -1, it means (in wxWindows) that all text should
 980     // be selected - translate into Windows convention
 981     if ( (from == -1) && (to == -1) )
 982     {
 983         from = 0;
 984         to = -1;
 985     }
 986
 987     DoSetSelection(from, to);
 988 }
 989
 990 void wxTextCtrl::DoSetSelection(long from, long to, bool scrollCaret)
 991 {
 992     HWND hWnd = GetHwnd();
 993
 994 #ifdef __WIN32__
 995 #if wxUSE_RICHEDIT
 996     if ( IsRich() )
 997     {
 998         CHARRANGE range;
 999         range.cpMin = from;
1000         range.cpMax = to;
1001         SendMessage(hWnd, EM_EXSETSEL, 0, (LPARAM) &range);
1002     }
1003     else
1004 #endif // wxUSE_RICHEDIT
1005     {
1006         SendMessage(hWnd, EM_SETSEL, (WPARAM)from, (LPARAM)to);
1007     }
1008
1009     if ( scrollCaret )
1010     {
1011 #if wxUSE_RICHEDIT
1012         // richedit 3.0 (i.e. the version living in riched20.dll distributed
1013         // with Windows 2000 and beyond) doesn't honour EM_SCROLLCARET when
1014         // emulating richedit 2.0 unless the control has focus or ECO_NOHIDESEL
1015         // option is set (but it does work ok in richedit 1.0 mode...)
1016         //
1017         // so to make it work we either need to give focus to it here which
1018         // will probably create many problems (dummy focus events; window
1019         // containing the text control being brought to foreground
1020         // unexpectedly; ...) or to temporarily set ECO_NOHIDESEL which may
1021         // create other problems too -- and in fact it does because if we turn
1022         // on/off this style while appending the text to the control, the
1023         // vertical scrollbar never appears in it even if we append tons of
1024         // text and to work around this the only solution I found was to use
1025         // ES_DISABLENOSCROLL
1026         //
1027         // this is very ugly but I don't see any other way to make this work
1028         if ( GetRichVersion() > 1 )
1029         {
1030             if ( !HasFlag(wxTE_NOHIDESEL) )
1031             {
1032                 ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1033                               ECOOP_OR, ECO_NOHIDESEL);
1034             }
1035             //else: everything is already ok
1036         }
1037 #endif // wxUSE_RICHEDIT
1038
1039         SendMessage(hWnd, EM_SCROLLCARET, (WPARAM)0, (LPARAM)0);
1040
1041 #if wxUSE_RICHEDIT
1042         // restore ECO_NOHIDESEL if we changed it
1043         if ( GetRichVersion() > 1 && !HasFlag(wxTE_NOHIDESEL) )
1044         {
1045             ::SendMessage(GetHwnd(), EM_SETOPTIONS,
1046                           ECOOP_AND, ~ECO_NOHIDESEL);
1047         }
1048 #endif // wxUSE_RICHEDIT
1049     }
1050 #else // Win16
1051     // WPARAM is 0: selection is scrolled into view
1052     SendMessage(hWnd, EM_SETSEL, (WPARAM)0, (LPARAM)MAKELONG(from, to));
1053 #endif // Win32/16
1054 }
1055
1056 // ----------------------------------------------------------------------------
1057 // Editing
1058 // ----------------------------------------------------------------------------
1059
1060 void wxTextCtrl::Replace(long from, long to, const wxString& value)
1061 {
1062     // Set selection and remove it
1063     DoSetSelection(from, to, FALSE /* don't scroll caret into view */);
1064
1065     SendMessage(GetHwnd(), EM_REPLACESEL,
1066 #ifdef __WIN32__
1067                 TRUE,
1068 #else
1069                 FALSE,
1070 #endif
1071                 (LPARAM)value.c_str());
1072 }
1073
1074 void wxTextCtrl::Remove(long from, long to)
1075 {
1076     Replace(from, to, _T(""));
1077 }
1078
1079 bool wxTextCtrl::LoadFile(const wxString& file)
1080 {
1081     if ( wxTextCtrlBase::LoadFile(file) )
1082     {
1083         // update the size limit if needed
1084         AdjustSpaceLimit();
1085
1086         return TRUE;
1087     }
1088
1089     return FALSE;
1090 }
1091
1092 bool wxTextCtrl::IsModified() const
1093 {
1094     return SendMessage(GetHwnd(), EM_GETMODIFY, 0, 0) != 0;
1095 }
1096
1097 // Makes 'unmodified'
1098 void wxTextCtrl::DiscardEdits()
1099 {
1100     SendMessage(GetHwnd(), EM_SETMODIFY, FALSE, 0L);
1101 }
1102
1103 int wxTextCtrl::GetNumberOfLines() const
1104 {
1105     return (int)SendMessage(GetHwnd(), EM_GETLINECOUNT, (WPARAM)0, (LPARAM)0);
1106 }
1107
1108 long wxTextCtrl::XYToPosition(long x, long y) const
1109 {
1110     // This gets the char index for the _beginning_ of this line
1111     long charIndex = SendMessage(GetHwnd(), EM_LINEINDEX, (WPARAM)y, (LPARAM)0);
1112
1113     return charIndex + x;
1114 }
1115
1116 bool wxTextCtrl::PositionToXY(long pos, long *x, long *y) const
1117 {
1118     HWND hWnd = GetHwnd();
1119
1120     // This gets the line number containing the character
1121     long lineNo;
1122 #if wxUSE_RICHEDIT
1123     if ( IsRich() )
1124     {
1125         lineNo = SendMessage(hWnd, EM_EXLINEFROMCHAR, 0, (LPARAM)pos);
1126     }
1127     else
1128 #endif // wxUSE_RICHEDIT
1129     {
1130         lineNo = SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, 0);
1131     }
1132
1133     if ( lineNo == -1 )
1134     {
1135         // no such line
1136         return FALSE;
1137     }
1138
1139     // This gets the char index for the _beginning_ of this line
1140     long charIndex = SendMessage(hWnd, EM_LINEINDEX, (WPARAM)lineNo, (LPARAM)0);
1141     if ( charIndex == -1 )
1142     {
1143         return FALSE;
1144     }
1145
1146     // The X position must therefore be the different between pos and charIndex
1147     if ( x )
1148         *x = pos - charIndex;
1149     if ( y )
1150         *y = lineNo;
1151
1152     return TRUE;
1153 }
1154
1155 void wxTextCtrl::ShowPosition(long pos)
1156 {
1157     HWND hWnd = GetHwnd();
1158
1159     // To scroll to a position, we pass the number of lines and characters
1160     // to scroll *by*. This means that we need to:
1161     // (1) Find the line position of the current line.
1162     // (2) Find the line position of pos.
1163     // (3) Scroll by (pos - current).
1164     // For now, ignore the horizontal scrolling.
1165
1166     // Is this where scrolling is relative to - the line containing the caret?
1167     // Or is the first visible line??? Try first visible line.
1168 //    int currentLineLineNo1 = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)-1, (LPARAM)0L);
1169
1170     int currentLineLineNo = (int)SendMessage(hWnd, EM_GETFIRSTVISIBLELINE, (WPARAM)0, (LPARAM)0L);
1171
1172     int specifiedLineLineNo = (int)SendMessage(hWnd, EM_LINEFROMCHAR, (WPARAM)pos, (LPARAM)0L);
1173
1174     int linesToScroll = specifiedLineLineNo - currentLineLineNo;
1175
1176     if (linesToScroll != 0)
1177       (void)SendMessage(hWnd, EM_LINESCROLL, (WPARAM)0, (LPARAM)linesToScroll);
1178 }
1179
1180 long wxTextCtrl::GetLengthOfLineContainingPos(long pos) const
1181 {
1182     return ::SendMessage(GetHwnd(), EM_LINELENGTH, (WPARAM)pos, 0);
1183 }
1184
1185 int wxTextCtrl::GetLineLength(long lineNo) const
1186 {
1187     long pos = XYToPosition(0, lineNo);
1188
1189     return GetLengthOfLineContainingPos(pos);
1190 }
1191
1192 wxString wxTextCtrl::GetLineText(long lineNo) const
1193 {
1194     size_t len = (size_t)GetLineLength(lineNo) + 1;
1195
1196     // there must be at least enough place for the length WORD in the
1197     // buffer
1198     len += sizeof(WORD);
1199
1200     wxString str;
1201     wxChar *buf = str.GetWriteBuf(len);
1202
1203     *(WORD *)buf = (WORD)len;
1204     len = (size_t)::SendMessage(GetHwnd(), EM_GETLINE, lineNo, (LPARAM)buf);
1205     buf[len] = 0;
1206
1207     str.UngetWriteBuf(len);
1208
1209     return str;
1210 }
1211
1212 void wxTextCtrl::SetMaxLength(unsigned long len)
1213 {
1214     ::SendMessage(GetHwnd(), EM_LIMITTEXT, len, 0);
1215 }
1216
1217 // ----------------------------------------------------------------------------
1218 // Undo/redo
1219 // ----------------------------------------------------------------------------
1220
1221 void wxTextCtrl::Undo()
1222 {
1223     if (CanUndo())
1224     {
1225         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1226     }
1227 }
1228
1229 void wxTextCtrl::Redo()
1230 {
1231     if (CanRedo())
1232     {
1233         // Same as Undo, since Undo undoes the undo, i.e. a redo.
1234         ::SendMessage(GetHwnd(), EM_UNDO, 0, 0);
1235     }
1236 }
1237
1238 bool wxTextCtrl::CanUndo() const
1239 {
1240     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1241 }
1242
1243 bool wxTextCtrl::CanRedo() const
1244 {
1245     return ::SendMessage(GetHwnd(), EM_CANUNDO, 0, 0) != 0;
1246 }
1247
1248 // ----------------------------------------------------------------------------
1249 // implemenation details
1250 // ----------------------------------------------------------------------------
1251
1252 void wxTextCtrl::Command(wxCommandEvent & event)
1253 {
1254     SetValue(event.GetString());
1255     ProcessCommand (event);
1256 }
1257
1258 void wxTextCtrl::OnDropFiles(wxDropFilesEvent& event)
1259 {
1260     // By default, load the first file into the text window.
1261     if (event.GetNumberOfFiles() > 0)
1262     {
1263         LoadFile(event.GetFiles()[0]);
1264     }
1265 }
1266
1267 // ----------------------------------------------------------------------------
1268 // kbd input processing
1269 // ----------------------------------------------------------------------------
1270
1271 bool wxTextCtrl::MSWShouldPreProcessMessage(WXMSG* pMsg)
1272 {
1273     MSG *msg = (MSG *)pMsg;
1274
1275     // check for our special keys here: if we don't do it and the parent frame
1276     // uses them as accelerators, they wouldn't work at all, so we disable
1277     // usual preprocessing for them
1278     if ( msg->message == WM_KEYDOWN )
1279     {
1280         WORD vkey = (WORD) msg->wParam;
1281         if ( (HIWORD(msg->lParam) & KF_ALTDOWN) == KF_ALTDOWN )
1282         {
1283             if ( vkey == VK_BACK )
1284                 return FALSE;
1285         }
1286         else // no Alt
1287         {
1288             // we want to process some Ctrl-foo and Shift-bar but no key
1289             // combinations without either Ctrl or Shift nor with both of them
1290             // pressed
1291             const int ctrl = wxIsCtrlDown(),
1292                       shift = wxIsShiftDown();
1293             switch ( ctrl + shift )
1294             {
1295                 default:
1296                     wxFAIL_MSG( _T("how many modifiers have we got?") );
1297                     // fall through
1298
1299                 case 0:
1300                 case 2:
1301                     break;
1302
1303                 case 1:
1304                     // either Ctrl or Shift pressed
1305                     if ( ctrl )
1306                     {
1307                         switch ( vkey )
1308                         {
1309                             case 'C':
1310                             case 'V':
1311                             case 'X':
1312                             case VK_INSERT:
1313                             case VK_DELETE:
1314                             case VK_HOME:
1315                             case VK_END:
1316                                 return FALSE;
1317                         }
1318                     }
1319                     else // Shift is pressed
1320                     {
1321                         if ( vkey == VK_INSERT || vkey == VK_DELETE )
1322                             return FALSE;
1323                     }
1324             }
1325         }
1326     }
1327
1328     return wxControl::MSWShouldPreProcessMessage(pMsg);
1329 }
1330
1331 void wxTextCtrl::OnChar(wxKeyEvent& event)
1332 {
1333     switch ( event.GetKeyCode() )
1334     {
1335         case WXK_RETURN:
1336             if ( !(m_windowStyle & wxTE_MULTILINE) )
1337             {
1338                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
1339                 InitCommandEvent(event);
1340                 event.SetString(GetValue());
1341                 if ( GetEventHandler()->ProcessEvent(event) )
1342                     return;
1343             }
1344             //else: multiline controls need Enter for themselves
1345
1346             break;
1347
1348         case WXK_TAB:
1349             // always produce navigation event - even if we process TAB
1350             // ourselves the fact that we got here means that the user code
1351             // decided to skip processing of this TAB - probably to let it
1352             // do its default job.
1353             {
1354                 wxNavigationKeyEvent eventNav;
1355                 eventNav.SetDirection(!event.ShiftDown());
1356                 eventNav.SetWindowChange(event.ControlDown());
1357                 eventNav.SetEventObject(this);
1358
1359                 if ( GetParent()->GetEventHandler()->ProcessEvent(eventNav) )
1360                     return;
1361             }
1362             break;
1363     }
1364
1365     // no, we didn't process it
1366     event.Skip();
1367 }
1368
1369 long wxTextCtrl::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
1370 {
1371     long lRc = wxTextCtrlBase::MSWWindowProc(nMsg, wParam, lParam);
1372
1373     if ( nMsg == WM_GETDLGCODE )
1374     {
1375         // we always want the chars and the arrows: the arrows for navigation
1376         // and the chars because we want Ctrl-C to work even in a read only
1377         // control
1378         long lDlgCode = DLGC_WANTCHARS | DLGC_WANTARROWS;
1379
1380         if ( IsEditable() )
1381         {
1382             // we may have several different cases:
1383             // 1. normal case: both TAB and ENTER are used for dlg navigation
1384             // 2. ctrl which wants TAB for itself: ENTER is used to pass to the
1385             //    next control in the dialog
1386             // 3. ctrl which wants ENTER for itself: TAB is used for dialog
1387             //    navigation
1388             // 4. ctrl which wants both TAB and ENTER: Ctrl-ENTER is used to go
1389             //    to the next control
1390
1391             // the multiline edit control should always get <Return> for itself
1392             if ( HasFlag(wxTE_PROCESS_ENTER) || HasFlag(wxTE_MULTILINE) )
1393                 lDlgCode |= DLGC_WANTMESSAGE;
1394
1395             if ( HasFlag(wxTE_PROCESS_TAB) )
1396                 lDlgCode |= DLGC_WANTTAB;
1397
1398             lRc |= lDlgCode;
1399         }
1400         else // !editable
1401         {
1402             // NB: use "=", not "|=" as the base class version returns the
1403             //     same flags is this state as usual (i.e. including
1404             //     DLGC_WANTMESSAGE). This is strange (how does it work in the
1405             //     native Win32 apps?) but for now live with it.
1406             lRc = lDlgCode;
1407         }
1408     }
1409
1410     return lRc;
1411 }
1412
1413 // ----------------------------------------------------------------------------
1414 // text control event processing
1415 // ----------------------------------------------------------------------------
1416
1417 bool wxTextCtrl::SendUpdateEvent()
1418 {
1419     // is event reporting suspended?
1420     if ( m_suppressNextUpdate )
1421     {
1422         // do process the next one
1423         m_suppressNextUpdate = FALSE;
1424
1425         return FALSE;
1426     }
1427
1428     wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
1429     InitCommandEvent(event);
1430     event.SetString(GetValue());
1431
1432     return ProcessCommand(event);
1433 }
1434
1435 bool wxTextCtrl::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
1436 {
1437     switch ( param )
1438     {
1439         case EN_SETFOCUS:
1440         case EN_KILLFOCUS:
1441             {
1442                 wxFocusEvent event(param == EN_KILLFOCUS ? wxEVT_KILL_FOCUS
1443                                                          : wxEVT_SET_FOCUS,
1444                                    m_windowId);
1445                 event.SetEventObject(this);
1446                 GetEventHandler()->ProcessEvent(event);
1447             }
1448             break;
1449
1450         case EN_CHANGE:
1451             SendUpdateEvent();
1452             break;
1453
1454         case EN_MAXTEXT:
1455             // the text size limit has been hit -- try to increase it
1456             if ( !AdjustSpaceLimit() )
1457             {
1458                 wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, m_windowId);
1459                 InitCommandEvent(event);
1460                 event.SetString(GetValue());
1461                 ProcessCommand(event);
1462             }
1463             break;
1464
1465             // the other edit notification messages are not processed
1466         default:
1467             return FALSE;
1468     }
1469
1470     // processed
1471     return TRUE;
1472 }
1473
1474 WXHBRUSH wxTextCtrl::OnCtlColor(WXHDC pDC, WXHWND WXUNUSED(pWnd), WXUINT WXUNUSED(nCtlColor),
1475 #if wxUSE_CTL3D
1476                                WXUINT message,
1477                                WXWPARAM wParam,
1478                                WXLPARAM lParam
1479 #else
1480                                WXUINT WXUNUSED(message),
1481                                WXWPARAM WXUNUSED(wParam),
1482                                WXLPARAM WXUNUSED(lParam)
1483 #endif
1484     )
1485 {
1486 #if wxUSE_CTL3D
1487     if ( m_useCtl3D )
1488     {
1489         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
1490         return (WXHBRUSH) hbrush;
1491     }
1492 #endif // wxUSE_CTL3D
1493
1494     HDC hdc = (HDC)pDC;
1495     if (GetParent()->GetTransparentBackground())
1496         SetBkMode(hdc, TRANSPARENT);
1497     else
1498         SetBkMode(hdc, OPAQUE);
1499
1500     wxColour colBack = GetBackgroundColour();
1501
1502     if (!IsEnabled() && (GetWindowStyle() & wxTE_MULTILINE) == 0)
1503         colBack = wxSystemSettings::GetColour(wxSYS_COLOUR_3DFACE);
1504
1505     ::SetBkColor(hdc, wxColourToRGB(colBack));
1506     ::SetTextColor(hdc, wxColourToRGB(GetForegroundColour()));
1507
1508     wxBrush *brush = wxTheBrushList->FindOrCreateBrush(colBack, wxSOLID);
1509
1510     return (WXHBRUSH)brush->GetResourceHandle();
1511 }
1512
1513 // In WIN16, need to override normal erasing because
1514 // Ctl3D doesn't use the wxWindows background colour.
1515 #ifdef __WIN16__
1516 void wxTextCtrl::OnEraseBackground(wxEraseEvent& event)
1517 {
1518     wxColour col(m_backgroundColour);
1519
1520 #if wxUSE_CTL3D
1521     if (m_useCtl3D)
1522         col = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1523 #endif
1524
1525     RECT rect;
1526     ::GetClientRect(GetHwnd(), &rect);
1527
1528     COLORREF ref = wxColourToRGB(col);
1529     HBRUSH hBrush = ::CreateSolidBrush(ref);
1530     if ( !hBrush )
1531         wxLogLastError(wxT("CreateSolidBrush"));
1532
1533     HDC hdc = (HDC)event.GetDC()->GetHDC();
1534
1535     int mode = ::SetMapMode(hdc, MM_TEXT);
1536
1537     ::FillRect(hdc, &rect, hBrush);
1538     ::DeleteObject(hBrush);
1539     ::SetMapMode(hdc, mode);
1540
1541 }
1542 #endif // Win16
1543
1544 bool wxTextCtrl::AdjustSpaceLimit()
1545 {
1546 #ifndef __WIN16__
1547     unsigned int limit = ::SendMessage(GetHwnd(), EM_GETLIMITTEXT, 0, 0);
1548
1549     // HACK: we try to automatically extend the limit for the amount of text
1550     //       to allow (interactively) entering more than 64Kb of text under
1551     //       Win9x but we shouldn't reset the text limit which was previously
1552     //       set explicitly with SetMaxLength()
1553     //
1554     //       we could solve this by storing the limit we set in wxTextCtrl but
1555     //       to save space we prefer to simply test here the actual limit
1556     //       value: we consider that SetMaxLength() can only be called for
1557     //       values < 32Kb
1558     if ( limit < 0x8000 )
1559     {
1560         // we've got more text than limit set by SetMaxLength()
1561         return FALSE;
1562     }
1563
1564     unsigned int len = ::GetWindowTextLength(GetHwnd());
1565     if ( len >= limit )
1566     {
1567         limit = len + 0x8000;    // 32Kb
1568
1569 #if wxUSE_RICHEDIT
1570         if ( IsRich() )
1571         {
1572             // as a nice side effect, this also allows passing limit > 64Kb
1573             ::SendMessage(GetHwnd(), EM_EXLIMITTEXT, 0, limit);
1574         }
1575         else
1576 #endif // wxUSE_RICHEDIT
1577         {
1578             if ( limit > 0xffff )
1579             {
1580                 // this will set it to a platform-dependent maximum (much more
1581                 // than 64Kb under NT)
1582                 limit = 0;
1583             }
1584
1585             ::SendMessage(GetHwnd(), EM_LIMITTEXT, limit, 0);
1586         }
1587     }
1588 #endif // !Win16
1589
1590     // we changed the limit
1591     return TRUE;
1592 }
1593
1594 bool wxTextCtrl::AcceptsFocus() const
1595 {
1596     // we don't want focus if we can't be edited unless we're a multiline
1597     // control because then it might be still nice to get focus from keyboard
1598     // to be able to scroll it without mouse
1599     return (IsEditable() || IsMultiLine()) && wxControl::AcceptsFocus();
1600 }
1601
1602 wxSize wxTextCtrl::DoGetBestSize() const
1603 {
1604     int cx, cy;
1605     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
1606
1607     int wText = DEFAULT_ITEM_WIDTH;
1608
1609     int hText = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
1610     if ( m_windowStyle & wxTE_MULTILINE )
1611     {
1612         hText *= wxMax(GetNumberOfLines(), 5);
1613     }
1614     //else: for single line control everything is ok
1615
1616     return wxSize(wText, hText);
1617 }
1618
1619 // ----------------------------------------------------------------------------
1620 // standard handlers for standard edit menu events
1621 // ----------------------------------------------------------------------------
1622
1623 void wxTextCtrl::OnCut(wxCommandEvent& WXUNUSED(event))
1624 {
1625     Cut();
1626 }
1627
1628 void wxTextCtrl::OnCopy(wxCommandEvent& WXUNUSED(event))
1629 {
1630     Copy();
1631 }
1632
1633 void wxTextCtrl::OnPaste(wxCommandEvent& WXUNUSED(event))
1634 {
1635     Paste();
1636 }
1637
1638 void wxTextCtrl::OnUndo(wxCommandEvent& WXUNUSED(event))
1639 {
1640     Undo();
1641 }
1642
1643 void wxTextCtrl::OnRedo(wxCommandEvent& WXUNUSED(event))
1644 {
1645     Redo();
1646 }
1647
1648 void wxTextCtrl::OnDelete(wxCommandEvent& event)
1649 {
1650     long from, to;
1651     GetSelection(& from, & to);
1652     if (from != -1 && to != -1)
1653         Remove(from, to);
1654 }
1655
1656 void wxTextCtrl::OnSelectAll(wxCommandEvent& event)
1657 {
1658     SetSelection(-1, -1);
1659 }
1660
1661 void wxTextCtrl::OnUpdateCut(wxUpdateUIEvent& event)
1662 {
1663     event.Enable( CanCut() );
1664 }
1665
1666 void wxTextCtrl::OnUpdateCopy(wxUpdateUIEvent& event)
1667 {
1668     event.Enable( CanCopy() );
1669 }
1670
1671 void wxTextCtrl::OnUpdatePaste(wxUpdateUIEvent& event)
1672 {
1673     event.Enable( CanPaste() );
1674 }
1675
1676 void wxTextCtrl::OnUpdateUndo(wxUpdateUIEvent& event)
1677 {
1678     event.Enable( CanUndo() );
1679 }
1680
1681 void wxTextCtrl::OnUpdateRedo(wxUpdateUIEvent& event)
1682 {
1683     event.Enable( CanRedo() );
1684 }
1685
1686 void wxTextCtrl::OnUpdateDelete(wxUpdateUIEvent& event)
1687 {
1688     long from, to;
1689     GetSelection(& from, & to);
1690     event.Enable(from != -1 && to != -1 && from != to && IsEditable()) ;
1691 }
1692
1693 void wxTextCtrl::OnUpdateSelectAll(wxUpdateUIEvent& event)
1694 {
1695     event.Enable(GetLastPosition() > 0);
1696 }
1697
1698 void wxTextCtrl::OnRightClick(wxMouseEvent& event)
1699 {
1700 #if wxUSE_RICHEDIT
1701     if (IsRich())
1702     {
1703         if (!m_privateContextMenu)
1704         {
1705             m_privateContextMenu = new wxMenu;
1706             m_privateContextMenu->Append(wxID_UNDO, _("&Undo"));
1707             m_privateContextMenu->Append(wxID_REDO, _("&Redo"));
1708             m_privateContextMenu->AppendSeparator();
1709             m_privateContextMenu->Append(wxID_CUT, _("Cu&t"));
1710             m_privateContextMenu->Append(wxID_COPY, _("&Copy"));
1711             m_privateContextMenu->Append(wxID_PASTE, _("&Paste"));
1712             m_privateContextMenu->Append(wxID_CLEAR, _("&Delete"));
1713             m_privateContextMenu->AppendSeparator();
1714             m_privateContextMenu->Append(wxID_SELECTALL, _("Select &All"));
1715         }
1716         PopupMenu(m_privateContextMenu, event.GetPosition());
1717         return;
1718     }
1719     else
1720 #endif
1721     event.Skip();
1722 }
1723
1724 // the rest of the file only deals with the rich edit controls
1725 #if wxUSE_RICHEDIT
1726
1727 // ----------------------------------------------------------------------------
1728 // EN_LINK processing
1729 // ----------------------------------------------------------------------------
1730
1731 bool wxTextCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
1732 {
1733     NMHDR *hdr = (NMHDR* )lParam;
1734     switch ( hdr->code )
1735     {
1736        case EN_MSGFILTER:
1737             {
1738                 const MSGFILTER *msgf = (MSGFILTER *)lParam;
1739                 UINT msg = msgf->msg;
1740
1741                 // this is a bit crazy but richedit 1.0 sends us all mouse
1742                 // events _except_ WM_LBUTTONUP (don't ask me why) so we have
1743                 // generate the wxWin events for this message manually
1744                 //
1745                 // NB: in fact, this is still not totally correct as it does
1746                 //     send us WM_LBUTTONUP if the selection was cleared by the
1747                 //     last click -- so currently we get 2 events in this case,
1748                 //     but as I don't see any obvious way to check for this I
1749                 //     leave this code in place because it's still better than
1750                 //     not getting left up events at all
1751                 if ( msg == WM_LBUTTONUP )
1752                 {
1753                     WXUINT flags = msgf->wParam;
1754                     int x = GET_X_LPARAM(msgf->lParam),
1755                         y = GET_Y_LPARAM(msgf->lParam);
1756
1757                     HandleMouseEvent(msg, x, y, flags);
1758                 }
1759             }
1760
1761             // return TRUE to process the event (and FALSE to ignore it)
1762             return TRUE;
1763
1764         case EN_LINK:
1765             {
1766                 const ENLINK *enlink = (ENLINK *)hdr;
1767
1768                 switch ( enlink->msg )
1769                 {
1770                     case WM_SETCURSOR:
1771                         // ok, so it is hardcoded - do we really nee to
1772                         // customize it?
1773                         ::SetCursor(GetHcursorOf(wxCursor(wxCURSOR_HAND)));
1774                         *result = TRUE;
1775                         break;
1776
1777                     case WM_MOUSEMOVE:
1778                     case WM_LBUTTONDOWN:
1779                     case WM_LBUTTONUP:
1780                     case WM_LBUTTONDBLCLK:
1781                     case WM_RBUTTONDOWN:
1782                     case WM_RBUTTONUP:
1783                     case WM_RBUTTONDBLCLK:
1784                         // send a mouse event
1785                         {
1786                             static const wxEventType eventsMouse[] =
1787                             {
1788                                 wxEVT_MOTION,
1789                                 wxEVT_LEFT_DOWN,
1790                                 wxEVT_LEFT_UP,
1791                                 wxEVT_LEFT_DCLICK,
1792                                 wxEVT_RIGHT_DOWN,
1793                                 wxEVT_RIGHT_UP,
1794                                 wxEVT_RIGHT_DCLICK,
1795                             };
1796
1797                             // the event ids are consecutive
1798                             wxMouseEvent
1799                                 evtMouse(eventsMouse[enlink->msg - WM_MOUSEMOVE]);
1800
1801                             InitMouseEvent(evtMouse,
1802                                            GET_X_LPARAM(enlink->lParam),
1803                                            GET_Y_LPARAM(enlink->lParam),
1804                                            enlink->wParam);
1805
1806                             wxTextUrlEvent event(m_windowId, evtMouse,
1807                                                  enlink->chrg.cpMin,
1808                                                  enlink->chrg.cpMax);
1809
1810                             InitCommandEvent(event);
1811
1812                             *result = ProcessCommand(event);
1813                         }
1814                         break;
1815                 }
1816             }
1817             return TRUE;
1818     }
1819
1820     // not processed, leave it to the base class
1821     return wxTextCtrlBase::MSWOnNotify(idCtrl, lParam, result);
1822 }
1823
1824 // ----------------------------------------------------------------------------
1825 // colour setting for the rich edit controls
1826 // ----------------------------------------------------------------------------
1827
1828 bool wxTextCtrl::SetBackgroundColour(const wxColour& colour)
1829 {
1830     if ( !wxTextCtrlBase::SetBackgroundColour(colour) )
1831     {
1832         // colour didn't really change
1833         return FALSE;
1834     }
1835
1836     if ( IsRich() )
1837     {
1838         // rich edit doesn't use WM_CTLCOLOR, hence we need to send
1839         // EM_SETBKGNDCOLOR additionally
1840         ::SendMessage(GetHwnd(), EM_SETBKGNDCOLOR, 0, wxColourToRGB(colour));
1841     }
1842
1843     return TRUE;
1844 }
1845
1846 bool wxTextCtrl::SetForegroundColour(const wxColour& colour)
1847 {
1848     if ( !wxTextCtrlBase::SetForegroundColour(colour) )
1849     {
1850         // colour didn't really change
1851         return FALSE;
1852     }
1853
1854     if ( IsRich() )
1855     {
1856         // change the colour of everything
1857         CHARFORMAT cf;
1858         wxZeroMemory(cf);
1859         cf.cbSize = sizeof(cf);
1860         cf.dwMask = CFM_COLOR;
1861         cf.crTextColor = wxColourToRGB(colour);
1862         ::SendMessage(GetHwnd(), EM_SETCHARFORMAT, SCF_ALL, (LPARAM)&cf);
1863     }
1864
1865     return TRUE;
1866 }
1867
1868 // ----------------------------------------------------------------------------
1869 // styling support for rich edit controls
1870 // ----------------------------------------------------------------------------
1871
1872 #if wxUSE_RICHEDIT
1873
1874 bool wxTextCtrl::SetStyle(long start, long end, const wxTextAttr& style)
1875 {
1876     if ( !IsRich() )
1877     {
1878         // can't do it with normal text control
1879         return FALSE;
1880     }
1881
1882     // the richedit 1.0 doesn't handle setting background colour, so don't
1883     // even try to do anything if it's the only thing we want to change
1884     if ( m_verRichEdit == 1 && !style.HasFont() && !style.HasTextColour() &&
1885         !style.HasLeftIndent() && !style.HasRightIndent() && !style.HasAlignment() &&
1886         !style.HasTabs() )
1887     {
1888         // nothing to do: return TRUE if there was really nothing to do and
1889         // FALSE if we failed to set bg colour
1890         return !style.HasBackgroundColour();
1891     }
1892
1893     // order the range if needed
1894     if ( start > end )
1895     {
1896         long tmp = start;
1897         start = end;
1898         end = tmp;
1899     }
1900
1901     // we can only change the format of the selection, so select the range we
1902     // want and restore the old selection later
1903     long startOld, endOld;
1904     GetSelection(&startOld, &endOld);
1905
1906     // but do we really have to change the selection?
1907     bool changeSel = start != startOld || end != endOld;
1908
1909     if ( changeSel )
1910     {
1911         DoSetSelection(start, end, FALSE /* don't scroll caret into view */);
1912     }
1913
1914     // initialize CHARFORMAT struct
1915 #if wxUSE_RICHEDIT2
1916     CHARFORMAT2 cf;
1917 #else
1918     CHARFORMAT cf;
1919 #endif
1920
1921     wxZeroMemory(cf);
1922
1923     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
1924     // CHARFORMAT in that case
1925 #if wxUSE_RICHEDIT2
1926     if ( m_verRichEdit == 1 )
1927     {
1928         // this is the only thing the control is going to grok
1929         cf.cbSize = sizeof(CHARFORMAT);
1930     }
1931     else
1932 #endif
1933     {
1934         // CHARFORMAT or CHARFORMAT2
1935         cf.cbSize = sizeof(cf);
1936     }
1937
1938     if ( style.HasFont() )
1939     {
1940         // VZ: CFM_CHARSET doesn't seem to do anything at all in RichEdit 2.0
1941         //     but using it doesn't seem to hurt neither so leaving it for now
1942
1943         cf.dwMask |= CFM_FACE | CFM_SIZE | CFM_CHARSET |
1944                      CFM_ITALIC | CFM_BOLD | CFM_UNDERLINE;
1945
1946         // fill in data from LOGFONT but recalculate lfHeight because we need
1947         // the real height in twips and not the negative number which
1948         // wxFillLogFont() returns (this is correct in general and works with
1949         // the Windows font mapper, but not here)
1950         LOGFONT lf;
1951         wxFillLogFont(&lf, &style.GetFont());
1952         cf.yHeight = 20*style.GetFont().GetPointSize(); // 1 pt = 20 twips
1953         cf.bCharSet = lf.lfCharSet;
1954         cf.bPitchAndFamily = lf.lfPitchAndFamily;
1955         wxStrncpy( cf.szFaceName, lf.lfFaceName, WXSIZEOF(cf.szFaceName) );
1956
1957         // also deal with underline/italic/bold attributes: note that we must
1958         // always set CFM_ITALIC &c bits in dwMask, even if we don't set the
1959         // style to allow clearing it
1960         if ( lf.lfItalic )
1961         {
1962             cf.dwEffects |= CFE_ITALIC;
1963         }
1964
1965         if ( lf.lfWeight == FW_BOLD )
1966         {
1967             cf.dwEffects |= CFE_BOLD;
1968         }
1969
1970         if ( lf.lfUnderline )
1971         {
1972             cf.dwEffects |= CFE_UNDERLINE;
1973         }
1974
1975         // strikeout fonts are not supported by wxWindows
1976     }
1977
1978     if ( style.HasTextColour() )
1979     {
1980         cf.dwMask |= CFM_COLOR;
1981         cf.crTextColor = wxColourToRGB(style.GetTextColour());
1982     }
1983
1984 #if wxUSE_RICHEDIT2
1985     if ( m_verRichEdit != 1 && style.HasBackgroundColour() )
1986     {
1987         cf.dwMask |= CFM_BACKCOLOR;
1988         cf.crBackColor = wxColourToRGB(style.GetBackgroundColour());
1989     }
1990 #endif // wxUSE_RICHEDIT2
1991
1992     // do format the selection
1993     bool ok = ::SendMessage(GetHwnd(), EM_SETCHARFORMAT,
1994                             SCF_SELECTION, (LPARAM)&cf) != 0;
1995     if ( !ok )
1996     {
1997         wxLogDebug(_T("SendMessage(EM_SETCHARFORMAT, SCF_SELECTION) failed"));
1998     }
1999
2000     // now do the paragraph formatting
2001     PARAFORMAT2 pf;
2002     wxZeroMemory(pf);
2003     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2004     // PARAFORMAT in that case
2005 #if wxUSE_RICHEDIT2
2006     if ( m_verRichEdit == 1 )
2007     {
2008         // this is the only thing the control is going to grok
2009         pf.cbSize = sizeof(PARAFORMAT);
2010     }
2011     else
2012 #endif
2013     {
2014         // PARAFORMAT or PARAFORMAT2
2015         pf.cbSize = sizeof(pf);
2016     }
2017
2018     if (style.HasAlignment())
2019     {
2020         pf.dwMask |= PFM_ALIGNMENT;
2021         if (style.GetAlignment() == wxTEXT_ALIGNMENT_RIGHT)
2022             pf.wAlignment = PFA_RIGHT;
2023         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_CENTRE)
2024             pf.wAlignment = PFA_CENTER;
2025         else if (style.GetAlignment() == wxTEXT_ALIGNMENT_JUSTIFIED)
2026             pf.wAlignment = PFA_JUSTIFY;
2027         else
2028             pf.wAlignment = PFA_LEFT;
2029     }
2030
2031     if (style.HasLeftIndent())
2032     {
2033         pf.dwMask |= PFM_STARTINDENT;
2034
2035         // Convert from 1/10 mm to TWIPS
2036         pf.dxStartIndent = (int) (((double) style.GetLeftIndent()) * mm2twips / 10.0) ;
2037
2038         // TODO: do we need to specify dxOffset?
2039     }
2040
2041     if (style.HasRightIndent())
2042     {
2043         pf.dwMask |= PFM_RIGHTINDENT;
2044
2045         // Convert from 1/10 mm to TWIPS
2046         pf.dxRightIndent = (int) (((double) style.GetRightIndent()) * mm2twips / 10.0) ;
2047     }
2048
2049     if (style.HasTabs())
2050     {
2051         pf.dwMask |= PFM_TABSTOPS;
2052
2053         const wxArrayInt& tabs = style.GetTabs();
2054
2055         pf.cTabCount = wxMin(tabs.GetCount(), MAX_TAB_STOPS);
2056         size_t i;
2057         for (i = 0; i < (size_t) pf.cTabCount; i++)
2058         {
2059             // Convert from 1/10 mm to TWIPS
2060             pf.rgxTabs[i] = (int) (((double) tabs[i]) * mm2twips / 10.0) ;
2061         }
2062     }
2063
2064     if (pf.dwMask != 0)
2065     {
2066         // do format the selection
2067         bool ok = ::SendMessage(GetHwnd(), EM_SETPARAFORMAT,
2068             0, (LPARAM) &pf) != 0;
2069         if ( !ok )
2070         {
2071             wxLogDebug(_T("SendMessage(EM_SETPARAFORMAT, 0) failed"));
2072         }
2073     }
2074
2075     if ( changeSel )
2076     {
2077         // restore the original selection
2078         DoSetSelection(startOld, endOld, FALSE);
2079     }
2080
2081     return ok;
2082 }
2083
2084 bool wxTextCtrl::SetDefaultStyle(const wxTextAttr& style)
2085 {
2086     if ( !wxTextCtrlBase::SetDefaultStyle(style) )
2087         return FALSE;
2088
2089     // we have to do this or the style wouldn't apply for the text typed by the
2090     // user
2091     long posLast = GetLastPosition();
2092     SetStyle(posLast, posLast, m_defaultStyle);
2093
2094     return TRUE;
2095 }
2096
2097 bool wxTextCtrl::GetStyle(long position, wxTextAttr& style)
2098 {
2099     if ( !IsRich() )
2100     {
2101         // can't do it with normal text control
2102         return FALSE;
2103     }
2104
2105     // initialize CHARFORMAT struct
2106 #if wxUSE_RICHEDIT2
2107     CHARFORMAT2 cf;
2108 #else
2109     CHARFORMAT cf;
2110 #endif
2111
2112     wxZeroMemory(cf);
2113
2114     // we can't use CHARFORMAT2 with RichEdit 1.0, so pretend it is a simple
2115     // CHARFORMAT in that case
2116 #if wxUSE_RICHEDIT2
2117     if ( m_verRichEdit == 1 )
2118     {
2119         // this is the only thing the control is going to grok
2120         cf.cbSize = sizeof(CHARFORMAT);
2121     }
2122     else
2123 #endif
2124     {
2125         // CHARFORMAT or CHARFORMAT2
2126         cf.cbSize = sizeof(cf);
2127     }
2128     // we can only change the format of the selection, so select the range we
2129     // want and restore the old selection later
2130     long startOld, endOld;
2131     GetSelection(&startOld, &endOld);
2132
2133     // but do we really have to change the selection?
2134     bool changeSel = position != startOld || position != endOld;
2135
2136     if ( changeSel )
2137     {
2138         DoSetSelection(position, position, FALSE /* don't scroll caret into view */);
2139     }
2140
2141     // get the selection formatting
2142     (void) ::SendMessage(GetHwnd(), EM_GETCHARFORMAT,
2143                             SCF_SELECTION, (LPARAM)&cf) ;
2144
2145     LOGFONT lf;
2146     lf.lfHeight = cf.yHeight;
2147     lf.lfWidth = 0;
2148     lf.lfCharSet = ANSI_CHARSET; // FIXME: how to get correct charset?
2149     lf.lfClipPrecision = 0;
2150     lf.lfEscapement = 0;
2151     wxStrcpy(lf.lfFaceName, cf.szFaceName);
2152     if (cf.dwEffects & CFE_ITALIC)
2153         lf.lfItalic = TRUE;
2154     lf.lfOrientation = 0;
2155     lf.lfPitchAndFamily = cf.bPitchAndFamily;
2156     lf.lfQuality = 0;
2157     if (cf.dwEffects & CFE_STRIKEOUT)
2158         lf.lfStrikeOut = TRUE;
2159     if (cf.dwEffects & CFE_UNDERLINE)
2160         lf.lfUnderline = TRUE;
2161     if (cf.dwEffects & CFE_BOLD)
2162         lf.lfWeight = FW_BOLD;
2163
2164     wxFont font = wxCreateFontFromLogFont(& lf);
2165     if (font.Ok())
2166     {
2167         style.SetFont(font);
2168     }
2169     style.SetTextColour(wxColour(cf.crTextColor));
2170
2171 #if wxUSE_RICHEDIT2
2172     if ( m_verRichEdit != 1 )
2173     {
2174         // cf.dwMask |= CFM_BACKCOLOR;
2175         style.SetBackgroundColour(wxColour(cf.crBackColor));
2176     }
2177 #endif // wxUSE_RICHEDIT2
2178
2179     // now get the paragraph formatting
2180     PARAFORMAT2 pf;
2181     wxZeroMemory(pf);
2182     // we can't use PARAFORMAT2 with RichEdit 1.0, so pretend it is a simple
2183     // PARAFORMAT in that case
2184 #if wxUSE_RICHEDIT2
2185     if ( m_verRichEdit == 1 )
2186     {
2187         // this is the only thing the control is going to grok
2188         pf.cbSize = sizeof(PARAFORMAT);
2189     }
2190     else
2191 #endif
2192     {
2193         // PARAFORMAT or PARAFORMAT2
2194         pf.cbSize = sizeof(pf);
2195     }
2196
2197     // do format the selection
2198     (void) ::SendMessage(GetHwnd(), EM_GETPARAFORMAT, 0, (LPARAM) &pf) ;
2199
2200     style.SetLeftIndent( (int) ((double) pf.dxStartIndent * twips2mm * 10.0) );
2201     style.SetRightIndent( (int) ((double) pf.dxRightIndent * twips2mm * 10.0) );
2202
2203     if (pf.wAlignment == PFA_CENTER)
2204         style.SetAlignment(wxTEXT_ALIGNMENT_CENTRE);
2205     else if (pf.wAlignment == PFA_RIGHT)
2206         style.SetAlignment(wxTEXT_ALIGNMENT_RIGHT);
2207     else if (pf.wAlignment == PFA_JUSTIFY)
2208         style.SetAlignment(wxTEXT_ALIGNMENT_JUSTIFIED);
2209     else
2210         style.SetAlignment(wxTEXT_ALIGNMENT_LEFT);
2211
2212     wxArrayInt tabStops;
2213     size_t i;
2214     for (i = 0; i < (size_t) pf.cTabCount; i++)
2215     {
2216         tabStops[i] = (int) ((double) (pf.rgxTabs[i] & 0xFFFF) * twips2mm * 10.0) ;
2217     }
2218
2219     if ( changeSel )
2220     {
2221         // restore the original selection
2222         DoSetSelection(startOld, endOld, FALSE);
2223     }
2224
2225     return TRUE;
2226 }
2227
2228 #endif
2229
2230 // ----------------------------------------------------------------------------
2231 // wxRichEditModule
2232 // ----------------------------------------------------------------------------
2233
2234 bool wxRichEditModule::OnInit()
2235 {
2236     // don't do anything - we will load it when needed
2237     return TRUE;
2238 }
2239
2240 void wxRichEditModule::OnExit()
2241 {
2242     for ( size_t i = 0; i < WXSIZEOF(ms_hRichEdit); i++ )
2243     {
2244         if ( ms_hRichEdit[i] )
2245         {
2246             ::FreeLibrary(ms_hRichEdit[i]);
2247         }
2248     }
2249 }
2250
2251 /* static */
2252 bool wxRichEditModule::Load(int version)
2253 {
2254     // we don't support loading richedit 3.0 as I don't know how to distinguish
2255     // it from 2.0 anyhow
2256     wxCHECK_MSG( version == 1 || version == 2, FALSE,
2257                  _T("incorrect richedit control version requested") );
2258
2259     // make it the index in the array
2260     version--;
2261
2262     if ( ms_hRichEdit[version] == (HINSTANCE)-1 )
2263     {
2264         // we had already tried to load it and failed
2265         return FALSE;
2266     }
2267
2268     if ( ms_hRichEdit[version] )
2269     {
2270         // we've already got this one
2271         return TRUE;
2272     }
2273
2274     wxString dllname = version ? _T("riched20") : _T("riched32");
2275     dllname += _T(".dll");
2276
2277     ms_hRichEdit[version] = ::LoadLibrary(dllname);
2278
2279     if ( !ms_hRichEdit[version] )
2280     {
2281         wxLogSysError(_("Could not load Rich Edit DLL '%s'"), dllname.c_str());
2282
2283         ms_hRichEdit[version] = (HINSTANCE)-1;
2284
2285         return FALSE;
2286     }
2287
2288     return TRUE;
2289 }
2290
2291 #endif // wxUSE_RICHEDIT
2292
2293 #endif // wxUSE_TEXTCTRL